Applicator and mixer for viscous materials



United States Patent O APPLICATOR AND MIXER FOR VISCOUS MATERIALS Original application July 28, 1952, Ser. No. 301,174. 'gividetli and this application July 8, 1957, Ser. No.

3 Claims. (Cl. 222-413) This invention relates to the application of viscous compounds or mixtures, such as rubber-like sealing compounds.

It is often essential to flow compounds of this character over localities where surfaces are in contact, as, for example, around the flange of a cover plate for airplane gasoline tanks.

Such compounds are also used around bolts and nuts. The compound usually includes rubber-like, tacky material that hardens on exposure to air.

The individual constituents of such a mixture are a rubber material and a catalyzer. When mixed, setting takes places at a slow rate In order efficiently to utilize such compounds, they should accordingly be mixed at the time they are to be applied; for, otherwise, setting of the mixture would render them incapable to use.

It is one of the objects of this invention to provide a compact and inexpensive mixer and applicator that performs the essential function of intimate intermixture of the constituent elements at the time the compound is to be used.

It is another object of this invention to provide a structure for the mixer that effectively and intimately associates the catalyzer and rubber material, preferably by a rubbing, as well as a cutting, or comminuting action.

It is still another object of this invention to facilitate the cleaning of the parts, as by ready and rapid removal of these parts. This feature is particularly important, since the materials treated are sticky or gummy.

This application is a division of our application filed July 28, 1952, for Applicator and Mixer for Viscous Materials, Serial No. 301,174, now Patent No. 2,814,827, issued December 3, 1957.

This invention possesses many other advantages, and has other objects which may be made more clearly apparent from a consideration of one embodiment of the invention. For this purpose, there is shown a form in the drawings accompanying and forming a part of the present specification. This form will now be described in detail, illustrating the general principles of the invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of this invention is best defined bythe appended claims.

Referring to the drawings:

Figure 1 is a longitudinal sectional view illustrating. a mixer incorporating the present invention;

Figs. 2, 3 and 4 are sectional views taken along planes teriorly opening recess in which a mixer body may be detachably received. Such a mixer body 210 is illustrated in Fig. 1.

The mixer body 210 has threads 209 at its lower end by the aid of which it may be secured in the wall recess.

The cylinder spaces containing the materials to be mixed by the mixer are in communication with the in terior of the mixer body 210 via passages extending from opposite sides of the wall to the bottom of the wall recess in which the body 210 is accommodated. The body 210 has diametrically disposed inlet ports 211 and 212 that register with the ends of the corresponding wall passages. The constituent materials entering the mixer body 210 ultimately emerge from a spout-like coupling member 244 (Fig. 2). The constituent materials, however, undergo substantial intimate intermixture prior to arrival at the spout-like coupling member 244. An O-ring 208, accommodated in a peripheral groove 207 of the body 210 and above the threads 209, prevents passage of material outwardly of the recess past the periphery of the body 210. A sleeve member 213, serves to mount some of the mixer members and is inserted in a longitudinal bore 214 of the body member, and mounts a gear pump structure that not only causes intimate intermixture of the rubber material and catalyzer, but reduces the pressure required to be developed by the pistons 23. A main driving gear 215 of the gear pump is accommodated in an indicated by lines 22, 33 and 44 respectively of axial recess 216 in the sleeve 213 and is therein guided for angular rotation about an axis 217. This gear has in its lower end a non-circular recess 218 cooperable with a'rotary shaft carried by the mounting wall and project-- ing into the bottom of the wall recess.

the air motor shaft to the non-circular recess 218.

The sleeve 213 has inclined ports 220 and 221 aligned. with the inlet ports 211 and 212 of the body member- 210. The ports 220 and 221 communicate with the axial; bore 216 housing the main gear at places in the bore-.- 216, communicating not only with the sides of the gear;

215 but with the bottom thereof (Fig. 1).

As shown most clearly in Figs. 4 and 5, the sleeve 213- also has longitudinally extending arcuate recesses 222 and 223 communicating with the recess 216 of the main gear 215. These recesses 222 and 223 are on diametrically opposite sides of the axis 217 of gear 215. In the recesses are driven gears 224 and 225 in engagement with the main gear 215. The ports 220 and 221 are so located, as illustrated in Fig. 4, that they communicate not only with the main gear recess 216, but also with these recesses 222 and 223 respectively. Accordingly,.

material enteringthrough port 211 by the rotating structure, etc.

' l The sleeve 213 has at its upper end an annular flange 226 engaged by the main body member 210 to limit downward movement of the sleeve 213 in the bore 214. A flanged plate 227 (Figs. 1 and 3) has a reduced portion accommodated within an annular recess 228 of the flange 226. This plate, as illustrated most clearly in Fig. 5, has apertures 229 and 230 piloting shaft extensions 231 and 232 of the gears 224 and 225, respectively. The sleeve 213 furthermore has apertures 233 and 234 piloting shaft extensions at the other ends of the gears 224 and 225, respectively. The apertures 229 and 230 of the plate 227 and the apertures 233 and 234 of the The sleeve 213 has an annular, inwardly directed flange 219 that pro-- vides a seat for the main gear 215 and permits access ofi sleeve 213 serve-accurately to mount the gears 224 and 225 for rotation.

A cap member 235, forming the outlet 236 of the mixer mechanism, is secured to the main body member 210 by the aid of bolts 237 and 238. These bolts extend through appropriate apertures in the plate 227 and the flange 226 of the sleeve 213 for providing accurate alignment of the members. The bolts 237 and 238 are engaged by interrupted threads provided by the main body member 210.

The cap 235 provides a bore or chamber 255 (Fig. 1) adapted to form a part of the passage for the material. This chamber 255 opens on the lower side of the cap 235 and is in substantial alignment with the recess 216 for the main gear. Communication is established between the bore 216, recesses 222 and 223 for the gear members 224 and 225 to the chamber 255 by the aid of appropriate apertures 239 and 240(Fig. 3) through the plate 227.

Arcuate recesses 241 and 242 formed in the upper part of sleeve 213 (see dotted lines in Fig. 1; and also see Fig. 4) are in registry with the apertures 239 and 240 to facilitate the flow from the gear pump into the chamber 255. An outlet chamber 243 (Fig. 1), in communication at its lower end with the chamber 255, cornmunicates at the other end with the interior of a coupling member 244 threadedly accommodated in the cap member 235.

The coupling member 244, as shown most clearly in Fig. 2, provides a cylindrical outlet passage 245 communicating with the nozzle 4. In this passage 245 is a screw pump member 246 designed to aid in the flow of material through the mixer. This member has helically arranged threads that, upon rotation of the member 246, urges the material outwardly of the passage 245. This pump member 246 has a shaft extension 248 piloted in a recess 249 of the cap member 235.

For rotating the pump member 246, a bevel gear construction is provided (Figs. 1 and 2). One bevel gear 259 is carried by the shaft 248 of the pump 246 and is located in the outlet chamber 243. This bevel gear 250 is engaged by another bevel gear 251 in the chamber 255. The bevel gear 251 is mounted on a noncircular shaft extension 252 of the main gear 215 (see, also, Fig. 3). This shaft extension 252 extends into the chamber 255 through an appropriate aperture 253 of the plate 227. Appropriate slots 254, spaced 90 apart, are provided in the connector member 244 to facilitate flow of material into intimate engagement with the pump member 246.

Upon clockwise rotation of the main gear 215 by the air motor mechanism, as viewed in Figs. 2, 3, and 4, the threads 247 are arranged to aid the flow of material upon rotation of the pump member 246.

The bevel gear construction 250, 251 not only serves as the transmission mechanism for the pump 246, but aids the gear pump structures 215, 224, 225 in effecting intimate intermixture of the material.

The inventors claim:

1. In a mixer structure: a hollow open-ended body having a pair of separate inlet openings at one end angularly spaced about the longitudinal axis of said body; a support within the body, and having a central recess substantially aligned with said axis; an axially elongated driving gear mounted in said recess and having provisions for coupling to a source of rotary motion; said recess having an opening at one end for access to the corresponding end of the driving gear and at the other end for coupling of said source of motion to said driving gear; said support having a plurality of auxiliary recesses parallel to but intersecting the central recess; axially elongated supplemental gears in the auxiliary recesses and engaging the driving gear; means forming a pair of passages opening respectively only into the corresponding ends of two of the auxiliary receesses, and registering with said inlets, said passages being substantially spaced from the other corresponding ends of said auxiliary recesses; a plate covering said other end of said recess and having apertures through which material is forced by said gears; means secured to said body member and defining a chamber receiving the material from said plate opening, and having an outlet; and pump means located in said chamber and driven upon operati on-of said main gear for urging material to the outlet.

2. In a mixer structure: a body member having a through opening, and having coupling means at one end; a cap member secured to the other end of said body member; said body member having a pair of inlet ports adjacent said one end and extending into the body member; a support extending into the body member and having a flange clamped between the body member and the cap member, said support having a central recess and a pair of auxiliary recesses parallel to and intersecting the central recess; a main gear and a pair of supplemental gears in the central and auxiliary recesses, the supplemental gears being engaged by the main gear; the main gear having provisions for coupling to a source of rotary motion; said support having passage means extending from said inlets to a place adjacent the corresponding ends of said auxiliary recesses; said cap member having a chamber; a spout member secured to said cap member and forming an outlet; means defining a restricted flow path from said support recesses at a place spaced from said passage means to said cap member; a pair of bevel gears in said chamber, one of which is driven by said main gear, and the other of which is driven by said one bevel gear; and a helical pump member extending into said spout member and connected to said other bevel gear.

3. The combination as set forth in claim 1 in which said outlet is formed by a tubular nozzle having an axis extending substantially at right angles to the axes of said main and auxiliary recesses; in which said pump means comprises a helical member extending throughout a sub stantial length of said tubular nozzle; and in which the means whereby the pump means is driven by operation of said main gear comprises a pair of bevel gears located in said receiving chamber and connected respectively to said pump means and said main gear.

References Cited in the file of this patent UNITED STATES PATENTS 2,362,922 'Palm Nov. 14, 1944 2,651,545 Shotton Sept. 8, 1953 2,728,300 Stoermer Dec. 27, 1955 2,754,542 Henning et al. July 17, 1956 

